Fish Passage Site 20203736

Coordinates (dec. deg.): 60.15505°, -149.42659°
Legal Description: S001N001W27
Region: South Central
Road Name: Driveway

Datum: NAD83
Quad Name / ITM: Seward A-7
AWC Stream #: 231-30-10080-2010-3029-4015
Stream Name: Unnamed

Elevation:

Site Comments: Culverts on driveway to Twin Peaks Lodge just off of Old Exit Glacier Road

Survey Date: Jul 20, 2017

Survey KEN17-81_2007

Observers: Jeff Sires, Luke Violette, Louis Mitchell

Overall Fish Passage Rating: Red

Tidal: No
Backwatered: No

Step Pools: No
Construction Year:


Site Observations:

  1. Constriction ratio red
  2. Culvert gradient red
  3. Road bank erosion

Comments: KWFRES_17_09. Culvert assessment data and photographs submitted by Kenai Watershed Forum. Road fill eroding into creek. Notes indicated 2 Coho were caught in upstream trap. No photos for positive ID.

Culvert Measurements

ID: 1 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 19.895
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 10.0
Sedimentation At Inlet: Yes
Inlet Substrate: Silt/Clay
Outlet Substrate:
InletOutlet
Width(ft):3.0 3.0
Height(ft):2.5 2.5
Apron Length(ft):
Water Depth(ft): 0.16
Rustline Height(ft):0.75
Substrate Depth(ft):0.83
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.35
Culvert Gradient: 1.31%
Max Slope:
Max Slope Length:
 

Comments: Water surface gradient through culvert 1.11%. Downstream stream gradient 0.41%.
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio red
  3. Road bank erosion
ID: 2 Structure Type: Circular pipe (Corrugated steel) Fish Passage Rating: Red
 
Length(ft): 20.34
Inlet Type: Projecting
Outlet Type: Projecting
Corrugation Depth(in.): 0.5
Corrugation Width(in.): 3.0
Condition Rating(1-5): 3
Approach Angle: 10.0
Sedimentation At Inlet: Yes
Inlet Substrate: Silt/Clay
Outlet Substrate: Gravel
InletOutlet
Width(ft):3.0 3.0
Height(ft):2.83 2.5
Apron Length(ft):
Water Depth(ft): 0.28
Rustline Height(ft):1.0
Substrate Depth(ft):
Backwatered?: No
Baffles Present: No
Embedded?: No
Outfall Height: 0.0
Outfall Type: At Stream Grade
Constriction Ratio: 0.35
Culvert Gradient: 2.16%
Max Slope:
Max Slope Length:
 

Comments: No substrate depth recorded for culvert. Water surface gradient through culvert 0.93%. Downstream gradient at 0.41%, upstream 0.48%.
  Culvert Observations:
  1. Culvert gradient red
  2. Constriction ratio red
  3. Road bank erosion

Stream Measurements

Stream SubstratesUpstreamDownstream
Dominant:Silt/ClayGravel
Subdominant:GravelCobble
Stream Slope(deg.):0.48
Stream Flow Stage:Medium
Stream Width Type Distance From
Crossing (ft)		 Stream
Width (ft)
Downstream ordinary high water 20.0 7.50
Downstream ordinary high water 40.0 6.25
Downstream ordinary high water 71.0 6.50
Upstream ordinary high water 28.0 12.00
Upstream ordinary high water 48.0 12.50
Upstream ordinary high water 80.0 10.50
Upstream ordinary high water 100.0 13.00

Elevations

Locator ID Culvert
Number		 River
Distance (ft)1		 Distance From
Crossing (ft)2		 Relative
Elevation (ft)
Road Elev 101.42
D/S Thalweg 0.00 96.75
D/S Water Surface Elev 0.00 97.10
D/S Grade Ctrl (Thalweg) 26.00 97.07
D/S Water Surface Elev 26.00 97.33
D/S Water Surface Elev 69.00 97.50
D/S Grade Ctrl (Thalweg) (grade point in middle of riffle) 69.00 97.24
D/S Thalweg 88.00 96.61
D/S Water Surface Elev 88.00 97.56
D/S Water Surface Elev 108.00 97.54
D/S Thalweg 108.00 96.70
D/S Thalweg (At end of outlet riffle) 115.00 96.93
D/S Water Surface Elev 115.00 97.54
D/S Grade Ctrl (Thalweg) (2 feet below outlet at head of outlet riffle) 118.00 97.29
D/S Water Surface Elev 118.00 97.52
Outlet Invert 1 120.00 97.59
D/S Water Surface Elev 2 120.00 97.67
D/S Water Surface Elev 1 120.00 97.75
Outlet Culvert Top 2 120.00 99.98
Outlet Culvert Top 1 120.00 100.14
Outlet Invert 2 120.00 97.39
Inlet Culvert Invert 2 140.00 97.39
Inlet Culvert Invert 1 140.00 97.51
Inlet Culvert Top 1 140.00 100.40
Inlet Culvert Top 2 140.00 100.42
U/S Water Surface Elev 2 140.00 97.86
U/S Water Surface Elev 1 140.00 97.97
U/S Water Surface Elev 144.00 97.98
U/S Thalweg 144.00 97.07
U/S Thalweg 178.00 97.58
U/S Water Surface Elev 178.00 98.18
U/S Water Surface Elev 230.00 98.39
U/S Thalweg 230.00 97.72

Notes:

  1. River distance is measured continuously throughout the survey reach along the thalweg of the stream.
  2. Measured from each end of the crossing along the thalweg of the stream.

Fish Sampling Efforts

Gear Type: Minnow Trap (A) Trap Duration(h): 0.9
Comments: Trap set about 38 feet upstream. Noted 2 coho in trap, no photos for positive ID.
 
Gear Type: Minnow Trap (B) Trap Duration(h): 1.0
Comments: Trap set about 30 feet downstream.

Fish Observations

No fish observations occurred during this survey.

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